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NEET 2019
Exam
NEET
Year
2019
Subject
Physics
Chapter
Oscillations

NEET 2019 · Physics · Oscillations

The radius of circle, the period of revolution, initial position...

The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the figure.
The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the figure. y
yy-projection of the radius vector of rotating particle PP is

Options

  1. Ay(t)=−3cos⁡2\pit,y\left(t\right) = - 3\cos 2 \pit, where yy in mm
  2. By(t)=4sin⁡(\pit2)y\left(t\right) = 4\sin \left(\dfrac{\pit}{2}\right), where yy in mm
  3. Cy(t)=3cos⁡(3\pit2)y\left(t\right) = 3\cos \left(\dfrac{3\pit}{2}\right), where yy in mm
  4. Dy(t)=3cos⁡(\pit2)y\left(t\right) = 3\cos \left(\dfrac{\pit}{2}\right), where yy in mm

Correct answer

D. y(t)=3cos⁡(\pit2)y\left(t\right) = 3\cos \left(\dfrac{\pit}{2}\right), where yy in mm

Step-by-step solution

T = 4<br/><br />\omega = \dfrac{2\pi}{4} = \dfrac{\pi}{2}<br/><br />A = 3m<br/>At<br />Att = 0,,y = 3m<br/><br />∴ y = 3\cos \left(\dfrac{\pi}{2}t\right)
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